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Item Negative Ion Reactions in Nitrous Oxide-I-Carbon Dioxide Mixtures(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (11), 1972) Parkes, David A.The rate constants have been measured for the following reactions in N2O + CO2 mixtures at pressures in the Torr region, using a drift tube and mass filter: NO–+ 2CO2→ CO2·NO–+ CO2, k9= 7.5 × 10–29 cm6 molecule–2 s–1, NO–+ CO2→ NO + CO2+ e, k10= 1.0 × 10–11 cm3 molecule–1 s–1, NO–+ CO2+ N2O → CO–3+ N2+ NO, k12= 1.0 × 10–27 cm6 molecule–2 s–1, → N3O–2+ CO2, or → CO2·NO–+ NO2O, k13= 1.5 × 10–28 cm6 molecule–2 s–1. The results obtained here confirm the importance of collisional detachment from NO– in N2O negative ion chemistry.Item Electron Attachment and Negative Ion-Molecule Reactions in Nitrous Oxide(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (11), 1972) Parkes, David A.The negative ions formed in N2O and N2O and N2O + O2 mixtures have been studied in the gas phase using a drift tube and mass filter. Gas pressures were in the Torr range, and reduced fields were varied between 10–17 and 10–15 V cm2 molecule–1. The observed ion spectrum was found to be governed by the following reaction, with their associated thermal rate constants: e + N2O → N2+ O–, k1= 4 × 10–15 cm3 molecule–1 s–1, O–+ N2O → NO–+ NO, k3=(1.95 ± 0.06)× 10–10 cm3 molecule–1 s–1, NO–+ N2O → NO–2+ N2, k4=(2.8 ± 0.2)× 10–14 cm3 molecule–1 s–1, NO–+ 2N2O → N3O–2+ N2O, k5=(8.5 ± 1.5)× 10–30 cm6 molecule–2 s–1, O–+ 2N2O → N2O–2+ N2O, k6=(4.2 ± 0.5)× 10–29 cm6 molecule–2 s–1, NO–+ N2O → N2O + NO + e, k11=(6.0 ± 1.0)× 10–12 cm3 molecule–1 s–1, O–2+ N2O → O–3+ N2, k10 < 10–12 cm3 molecule–1 s–1. The rates of reaction, (5), (6) and (11) were weak functions of reduced field. In no experiment was any evidence found for the existence of a long-lived N2O– ion.